"Sometimes broadcasts can become echo chambers of conventional baseball wisdom .... I really appreciate how you two try to inject different angles and theories into the game" is probably what was the dig. Its shortly after the 40 minute mark.
Edit to add: I don't remember if Shepard was guilty of echo chambering or not. I don't remember of he avoided other lines of thought. I know Gibson has been good about bringing up choices and what ifs as moments in a game approach. So, I guess I don't know if that was a dig at anyone in particular or in general, or heck, maybe it was just nothing more than a compliment with no back handed malice intended for anyone? Is it allowable to do that in society anymore?